Damping device for truck-bolsters.



Patented Sept. 23, 1913.

W. G. PRICE.

DAMPING DEVICE FOR TRUCK BOLSTERS.

APPLICATION FILED APR.28, 1913.

FIG. 1

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WITNESSES.

UNTTE WILLIAM G. PRICE, OF NEW CASTLE, PENNSYLVANIA.

DAIJIPING DEVICE FOR TRUCK-BOLSTERS.

Specification of Letters Patent.

Application filed April 28, 1913.

iiatented Sept. 23, 1913.

Serial No. 764,160.

To all whom it may concern Be it known that I, TILLIAM (it. Pinon, a citizen of the United States, and resident of New Castle, in the county of Lawrence and State of Pennsylvania, have invented a new and useful Improvement in Damping Devices for Trucleliolsters; and, l do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to railway cartrucks, and more especially to a device for damping the swing and rolling of the bolster.

It is common practice in railway car trucks to mount the bolster upon swinging supports so that the bolster is free to swing longitudinally with respect to itself, and also move vertically by an cnd-wise movement. 3y allowing for this movement of the bolster the bolster is permitted to conform to the change of direction of the car body when rounding curves, on rough tracks and the like, and as a result better riding of the car is obtained. Unless this longitudinal and rocking movement of the bolster, however, is put under restraint the movement becomes cumulative and the swinging and rocking of the bolster becomes so great as to occasion the discomforturc of the passengers within the car.

The object of my present invention is to provide a simple and eflicient device by means of which this longitudinal and rocking movement of the bolster may be dampened, and to these ends the invention comprises the novel features hereinafter set forth and claimed.

In the accompanying drawing Figure 1 is a plan view of a portion of a truck and bolster showing my invention applied thereto; Fig. 2 is a section on the line 2-2 Fig. 1 Fig. 3 is a section on the line 3-3 Fig. 1; and Fig. & is a detail.

In the drawing the numeral 2 designates the side frame of a suitable truck to which the transoms 3 are connected. The bolster l is supported by the swinging supports 5 which are pivotally connected to the transom and the lower ends thereof engaging the leaf springs all in the ordinary manner. In this way the bolster is permitted to swing longitudinally and as the swinging supports are normally slightly inclined it is apparent that any longitudinal movement of the bolster will be attended with a slight vertical movement or rocking end-wise of the bolster. i

Secured to the side frame 2 is the plate 6 which is held in place by the bolts 7. This plate has the inclined. face 8. A dan'iperplate 9 is provided which may be hell crank in form, having the arm 10 which engages the inclined face 8 of the plate (3 and forms a fulcrum therewith. The damper-plate 9 is formed channel-shaped with the upper flange 11 and the lower flange 12. The flange 11 rests upon the lower guide plate 13 which is supported by the transom 3 and an upper guide plate 14 is prtwided, said guide plates being secured to the transom by the bolts 15. The upper flange 11. of the damper-plate has a slight amount of vertical play between the two guide plates 13 and 14 to permit of the slight vertical movement of the damper plate. The damper plate is provided with the downwardly extending portion 16 which is adapted to engage the side of the bolster 4.

A bolt 17 passes through the arm 10 of the damper plate and through the plate (5 and through the side frame 2. A spring 18 is carried by the bolt 17, said spring being interposed between the side frame and the dished washer 19 on the bolt 17. The ordinary nut 20 and jam nut 21 are provided by means of which the tension of the spring 18 may be regulated. The action of the spring 18 is to draw the damper-plate outward ly at the side frame and hold the plate against the inclined face 8 of the plate 6. This also tends to force the inner end of the damper-plate against the bolster due to the fulcrum action. A spring 22 is provided which bears against the outer end of the projecting portion 16 so as to force said portion against the bolstcand said spring is interposed between said plate and the transom. This spring passes through the bolster hanger bracket 23 and this forms a seat for the outer end of said spring to hold it in proper position.

When the bolster swings longitudinally of itself due to the action of the truck in. rounding curves or for other reasons the swing is damped by the damper-plates and the frictional contact of the damper-plate 11 is controlled by the action of the springs 18 and 22, and it is of course apparent that the tension of the spring 18 can be varied to suit conditions. The action of the spring 18 tends to hold the arm 10 of the damperplate in contact with the inclined face 8 of the plate 6 and this action together with springs 18 and 22 is to hold the bolster in.

contact with the damper-plate at the opposite side of the bolster, and when the brakes are applied the bolster will have a tendency to move away from the damper-plate, and in that case the damper-plate 11 yields sufli ciently to take care of this movement. Furthermore, the sidewise or lateral movement of the bolster is checked as well as the rocking and end swing of the bolster.

What I. claim is:

1-. In a car-truck, the combination with the frame, of a swing-bolster between the transoms of the same, a spring actuated damper-plate supported from the frame having a diagonal movement with reference to the bolster, anda portionon said damper plate engaging the side of the bolster.

2. In a car-truck, the combination with the frame, of a swing-bolster between the transoms of the same, a movable damperplatesupported from the frame, means tending to draw said damper-plate outwardly, and means carried by the frame engaged by said damper-plate to move the same laterally.

3. In a car-truck, the combination with theframe, of a swing-bolster between the transoms of. the same, a spring actuated damper-plate supported from the frame and engaging the bolster, means tendingto movesaid damper-plate longitudinally, an arm 011 said damper-plate, and an abutment on the frame with which said arm engages.

4:; In a car-truck, thecombination with the frame, of a swing-bolster between the transoms of the same, a spring actuated damper-plate supported fromthe frame and engaging the bolster, an arm on said plate, a bolt engaging said arm and connecting same to the frame,,a. spring on saidfbolt to draw said plate outwardly, and an abutment on the frame with which said arm engages, and a spring bearingv against the damper-plate;

5. In a car-truck, the combination with the frame, of a swing-bolster between the transoms of the same, a movable damperplate supported from the frame and en gaging the bolster, an arm on said plate, a bolt engaging said arm and connecting it to the frame, a springfon said bolt, an inclined abutment on the frame with which said arm engages, and a spring bearing against said plate.

6. In a car-truck, the combination with 'the frame, of a swing-bolster between the transoms of the same, a, movable damperplate, an arm on said plate, a bolt engaging said arm and connecting same to the frame,

a spring on said" bolt interposed between said frame and a stop on said bolt, aninclined abutment on the frame engaged by. said arm, and a spring engaging said plate interposed between the same and the frame.

7. In a car-truck, the combination with the frame, of a swing-bolster between transome of the same, a bell-crank damper-plate, one arm of which engages the bolster, an abutment on the frame with which said damper engages to form a fulcrum and a spring supported by the frame acting onone arm of said damper to draw the other arm toward the bolster.

8. In a car-truck, the combination with the frame, of a swing-bolster between the transoms of the same,amovable bell-crank damper-plate fulcrumed. on the same, and a spring supported by the frame acting on one arm of said'bell-crank.tozdraw the other l/VIILLIAIVI G. PRICE.

Witnesses:

ROBERT C. To'r'rEN,.. JOHN F. WILL.

Copies of this patent maybe obtained. for five cents each, by addressing: the. Gommissioner ofrlatents;

Washington, D. 0. 

